In aspirin, a carboxylic acid whose structure is shown above, which labeled H atom is the one that is acidic (makes the entire structure one of the carboxylic acid subclass)?

Question

Quizplus · Accepted Answer

The H atom labeled in option B is bonded to the O atom, which is also bonded to the C atom with the double bond to the O atom. This H atom is acidic due to the resonance stabilization of the resulting carboxylate ion. It is the one that makes the entire structure one of the carboxylic acid subclass.

In Aspirin, a Carboxylic Acid Whose Structure Is Shown Above